public class Exercise01_07 {
  public static void main(String[] args) {
    System.out.println(4 * (1 - 1.0 / 3 + 1.0 / 5 - 1.0 / 7 +
        1.0 / 9 - 1.0 / 11));
    
    System.out.println(4 * (1 - 1.0 / 3 + 1.0 / 5 - 1.0 / 7 +
        1.0 / 9 - 1.0 / 11 + 1.0 / 13));
  }
}
